EP1787773B1 - Gehrungssäge mit einer aus einer Gelenkverbindung bestehenden Linearführung - Google Patents

Gehrungssäge mit einer aus einer Gelenkverbindung bestehenden Linearführung Download PDF

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Publication number
EP1787773B1
EP1787773B1 EP20060124239 EP06124239A EP1787773B1 EP 1787773 B1 EP1787773 B1 EP 1787773B1 EP 20060124239 EP20060124239 EP 20060124239 EP 06124239 A EP06124239 A EP 06124239A EP 1787773 B1 EP1787773 B1 EP 1787773B1
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EP
European Patent Office
Prior art keywords
saw
motor assembly
blade
saw blade
hinge
Prior art date
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Active
Application number
EP20060124239
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English (en)
French (fr)
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EP1787773A1 (de
Inventor
Stephen C. Oberheim
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication of EP1787773A1 publication Critical patent/EP1787773A1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B5/00—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor
    • B27B5/16—Saw benches
    • B27B5/18—Saw benches with feedable circular saw blade, e.g. arranged on a carriage
    • B27B5/20—Saw benches with feedable circular saw blade, e.g. arranged on a carriage the saw blade being adjustable according to depth or angle of cut; Radial saws, i.e. sawing machines with a pivoted radial arm for guiding the movable carriage
    • B27B5/208—Saw benches with feedable circular saw blade, e.g. arranged on a carriage the saw blade being adjustable according to depth or angle of cut; Radial saws, i.e. sawing machines with a pivoted radial arm for guiding the movable carriage the saw blade being mounted on a hanging arm or at the end of a set of bars, e.g. parallelograms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D45/00—Sawing machines or sawing devices with circular saw blades or with friction saw discs
    • B23D45/04—Sawing machines or sawing devices with circular saw blades or with friction saw discs with a circular saw blade or the stock carried by a pivoted lever
    • B23D45/042—Sawing machines or sawing devices with circular saw blades or with friction saw discs with a circular saw blade or the stock carried by a pivoted lever with the saw blade carried by a pivoted lever
    • B23D45/046—Sawing machines or sawing devices with circular saw blades or with friction saw discs with a circular saw blade or the stock carried by a pivoted lever with the saw blade carried by a pivoted lever the pivoted lever being mounted on a carriage
    • B23D45/048—Sawing machines or sawing devices with circular saw blades or with friction saw discs with a circular saw blade or the stock carried by a pivoted lever with the saw blade carried by a pivoted lever the pivoted lever being mounted on a carriage the saw blade being adjustable according to angle of cut
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/768—Rotatable disc tool pair or tool and carrier
    • Y10T83/7684—With means to support work relative to tool[s]
    • Y10T83/7693—Tool moved relative to work-support during cutting
    • Y10T83/7697—Tool angularly adjustable relative to work-support
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/768—Rotatable disc tool pair or tool and carrier
    • Y10T83/7684—With means to support work relative to tool[s]
    • Y10T83/7701—Supporting surface and tool axis angularly related
    • Y10T83/7705—Adjustable angular relationship
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/768—Rotatable disc tool pair or tool and carrier
    • Y10T83/7755—Carrier for rotatable tool movable during cutting
    • Y10T83/7763—Tool carrier reciprocable rectilinearly
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/768—Rotatable disc tool pair or tool and carrier
    • Y10T83/7755—Carrier for rotatable tool movable during cutting
    • Y10T83/7763—Tool carrier reciprocable rectilinearly
    • Y10T83/7768—With means to adjust path of reciprocation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/768—Rotatable disc tool pair or tool and carrier
    • Y10T83/7755—Carrier for rotatable tool movable during cutting
    • Y10T83/7763—Tool carrier reciprocable rectilinearly
    • Y10T83/7768—With means to adjust path of reciprocation
    • Y10T83/7772—Angular relative to previous path
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/768—Rotatable disc tool pair or tool and carrier
    • Y10T83/7755—Carrier for rotatable tool movable during cutting
    • Y10T83/7788—Tool carrier oscillated or rotated
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/8773—Bevel or miter cut

Definitions

  • the present invention generally relates to power miter saws.
  • Miter saws have been the subject of continued research and development efforts in the power tool arena for decades, and many improvements have been made that has resulted in increased ease of use and productivity.
  • Artisans who install trim carpentry have used power miter saws for some time and it is well known that wide stock such as crown molding and the like often requires a miter saw with either a bigger saw blade or a configuration that enables the blade to be moved along a horizontal path away and toward the fence of the miter saw.
  • Such blade moving configurations are generally marketed as sliding compound miter saws, principally because most if not all commercially available saws of this type have a sliding guide assembly comprised of elongated rods that slide in respective bushings to move the saw blade and motor assembly relative to the fence of the saw.
  • Such sliding guide assemblies are an expensive component of such miter saws.
  • the current state of the art for such sliding miter saws includes a linear guide that typically consists of two of such bushings and rod combinations.
  • These relatively expensive linear bearings consist of recirculating ball bearings that operate together with turned, ground, polished and hardened steel rods that are approximately 40 cm long and 30 mm in diameter.
  • precise fits are required between the rods and the linear recirculating ball bearings over the entire linear travel of the rods.
  • the rod must be made of a high hardness steel to prevent indentation by the hard steel balls. Such construction is relatively expensive.
  • bushing and rod linear guides are susceptible to damage from dirt and grit, particularly if the saw is a sliding abrasive cut off saw where an abrasive wheel is used to cut steel and other materials. The abrasive wheel grinds its way through the steel and produces a considerable volume of abrasive particles that generally come out of the back of the saw. These abrasive particles can penetrate into the ball bushings and damage the bearing. While it is possible to cover the rods with a bellows or similar cover, the hostile environment generally leads to degradation of the fabric and penetration of the ball bushing by the abrasive particles.
  • An 48871/85 A discloses a power miter saw comprising:
  • a power miter saw according to the invention is defined in independent claim 1.
  • the present invention is shown and described herein, with an embodiment having a multiple hinge linkage that is designated herein as a horizontal hinge linkage that interconnects the saw blade and motor assembly to the table of the miter saw.
  • the shaft axes of the horizontal hinge linkage are in a substantially horizontal orientation when the saw is set at a zero degree bevel position. Regardless of the bevel angle or the orientation of the surface on which the saw is supported, the shafts are parallel to the arbor shaft in which the blade is mounted and therefore perpendicular to the plane of the saw blade.
  • the horizontal hinge linkage is utilized rather than an elongated rod and bushing configuration and provides increased stiffness to undesired movement of the saw blade arising from structural deflections during cutting operations.
  • the embodiment also has a vertical hinge linkage for maintaining the elevation of the saw pivot head (to which the saw blade and motor assembly is attached) constant during movement of the saw blade and motor assembly away and toward the fence during a cutting operation.
  • An example not according to the invention utilizes the horizontal hinge linkage together with a single rod and bushing arrangement whereby the rod and bushing arrangement also maintains a constant elevation of the saw pivot head as the saw blade and motor assembly is moved toward and away from the fence during a cutting operation.
  • the saw blade and motor assembly 22 is pivotable about a saw pivot that is part of the saw pivot head, which is attached to the horizontal hinge linkage.
  • the saw blade and motor assembly can be pivoted up out of contact with a work piece or moved down into contact with a work piece during a cutting operation as is conventional for miter saws.
  • hinge linkages have a cost advantage compared to conventional bushing and rod guides because they have a simpler construction, which may comprise as few as two generally planar shaped linkages that are connected together by shafts that may preferably incorporate rotary bushings or low cost ball bearings and which are also linked to the support frame of the rotatable table as well as to the saw pivot head. Tight tolerance fits between hinge components are relatively easier to achieve using low cost ball bearings that are preloaded in the axial direction so that nearly all axial and radial play is removed. In contrast, conventional bushings and sliding rod systems require expensive manufacturing processes to ensure that the outside surface of the rod is precise over its entire lenth.
  • hinge linkages Another advantage of the use of hinge linkages is that their stiffness characteristics are determined primarily from the width of the hinge linkages as measured along the pivot, i.e., shaft axis. Thus, increased system stiffness can be achieved by making the hinge larger and this is generally less expensive than using larger rods and bushings.
  • the horizontal hinge linkage pivots around axes that are perpendicular to the cutting plane of the blade and therefore provides increased stiffness along the axis of rotation of the saw blade and because of this desirable characteristic, the length of the hinge shafts is greater than other shaft lengths such as those used in the vertical hinge linkage.
  • the structural stiffness is very important to the quality of cuts made by the saw. Without the requisite structural stiffness, it is common for the saw blade to deflect out of the desired cutting plane on an intermittent basis which can result in one or more cut discontinuities or jagged cut portions, rather than a continuous smooth cut at the desired angle.
  • hinge linkage has greatly reduced sensitivity to dirt and grit because the bearing surfaces of a hinge linkage are not exposed but are contained within a ball bearing or short rotary bushing.
  • Such ball bearing or rotary bushings can be relatively easily sealed compared to a rod and bushing system where the entire rod is a critical bearing surface and therefore has to be sealed with a large accordion or bellow shaped fabric or other type of cover which is often easily damaged.
  • the miter saw has a generally circular base 12 with an attached fence 14, which base supports a rotatable table 16 that has a miter arm control assembly, indicated generally at 18, for adjusting the rotational position of the table for setting the miter angle of work piece that would be placed on the table 16.
  • a saw blade and motor assembly is operatively connected to the table 16 by a linear guide mechanism, indicated generally at 22.
  • the saw blade and motor assembly 20 has an electric motor 24 that is operatively connected through a gear mechanism, not shown but located within housing portion 26 that drives a saw blade 28.
  • a handle 30 enables an operator to move the blade and motor assembly 20 into and out of engagement with a work piece that may be placed on the table 16 adjacent the fence 14.
  • the blade and motor assembly 20 is pivotable about a saw pivot shaft 32 that is connected to a saw pivot head 34 to which the linear guide mechanism 22 is attached.
  • the blade and motor assembly 20 is shown in FIG. 1 to be in a position where the blade is moved to its extended position away from the fence 14 and lowered into cutting position were a work piece placed on the table 16.
  • an operator places a work piece on the table 16, brings the handle 30 down into cutting position either before or after activating the motor 24 and then pushes the handle 30 toward the fence 14 to have the blade 28 cut the work piece.
  • the blade and motor assembly 20 would be essentially in the position shown in FIG. 2 where the bottom reach of the blade 28 is generally coextensive with the fence 14.
  • the linear guide mechanism 22 of the embodiment shown in FIGS. 1-4 is designed so that the miter saw has a dual bevel operation, rather than a single bevel operation, meaning that the bevel angle can be adjusted either right or left from the normal zero angle or position wherein the plane of the blade 28 is perpendicular to the plane of the top surface of the table 16.
  • the blade and motor assembly 20 as well as the linear guide mechanism can rotate about a bevel pivot shaft 36, with the linear guide mechanism having a support frame 38 with a generally cylindrical end portion 40 to which the bevel pivot shaft 36 is connected.
  • the shaft 36 extends through an opening in an enlarged extension 42 of the table 16.
  • the support frame 38 is preferably a casting that has a lower flange 44, an upper flange 46 as well as vertically oriented flanges 48 and 50.
  • a horizontal hinge linkage is comprised of links 52 and 54 which have adjacent ends connected together by a shaft 56.
  • the saw pivot head 34 has a pair of spaced flanges 58 as well as a single flange 60 located below the flanges 58.
  • the link 54 has its opposite end connected to the flanges 58 by a shaft 62.
  • the opposite end of the link 52 is connected to the vertical flanges 48 and 50 by a shaft 64.
  • the shafts 32, 62, 56, 64, 78 and 82 are preferably of the type which utilize rotary bushings or low cost ball bearings so that they are freely rotatable and will have an extended useful life.
  • the link 52 has a generally L-shaped side configuration with the transverse extension 66 having the aperture in which the shaft 56 is located.
  • the width of the links 52 and 54 is relatively large and therefore the shafts 56, 62 and 64 that interconnect the links 52 and 54 with one another and with the saw pivot head 34 and support frame 38 are relatively long. This contributes to the desirable stiffness of the linear guide mechanism which substantially reduces, if not eliminates, any movement by the blade out of the cutting plane which can result in poor quality cutting.
  • the extremely wide links and their coupling to the saw pivot head and support frame 38 results in high rigidity reducing torsional and linear deflection of the saw blade away from its intended cutting plane which is very desirable from a cut quality standpoint.
  • the link 52 is not a solid construction, but has side walls 68 and end walls 70 with cross braces 72 provided to provide increased overall strength for the link.
  • the link 54 is similarly constructed as is shown in FIG. 1 , it also having similarly configured side walls, end walls and cross braces.
  • the hinge links 52 and 54 are preferably die cast aluminum but can be steel stamping if desired.
  • the vertical hinge linkage is located below the horizontal hinge linkage and it comprises links 74 and 76 which have adjacent ends connected together by a vertical shaft 78.
  • the links 74 and 76 are not as wide as the horizontal hinge links 52 and 54 for the reason that their functionality is to maintain the elevation of the saw pivot head 34 constant during movement of the blade and motor assembly 20 toward and away from the fence 14. Elevational deflections are not as critical for a miter saw cut quality for the reason that the work piece is generally being completely cut through.
  • the narrower links 74 and 76 are vertically displaced from one another which requires the elongated vertical shaft 78 to extend to interconnect them.
  • the link 74 is located between the horizontal flanges 44 and 46 and is pivotally connected to these flanges by a shaft 80.
  • the link 76 has spaced flange portions that are connected to the flange 60 by a shaft 82. As is shown in FIG.
  • the flange 60 is located beneath the near flange 58 and the flanges 44 and 46 are also located beneath the vertical flanges 48 and 50, and the shaft 78 that interconnects the links 74 and 76 extends away or to the left side of the saw (as viewed from the handle 30) so that when the vertical and horizontal linkages are folded together as shown in FIG. 2 , little if any portion of the links extend outside of the width of the flanges 48 and 50. This is significant in that changing of the bevel angle of the blade and motor assembly 20 can be accomplished in either the left or right direction and the hinge linkages will not interfere with the dual bevel adjusting capability.
  • FIGS. 5-8 An example not according to the invention is shown in FIGS. 5-8 and have many similar components as the embodiment shown in FIGS. 1-4 .
  • components that are labeled with the same numbers as those shown and described with regard to the embodiment are substantially similar in their design, configuration and operation and therefore will not be described in detail.
  • Components with reference numbers having a prime or double prime designation are similar to those that are identified with regard to the embodiment shown in FIGS. 1-4 , but may have some structural differences which are apparent or which will be generally described. or which will be given different numbers than those illustrated in FIGS. 1-4 .
  • Said example is indicated generally at 100 in FIGS. 5-8 and has many similarities to the embodiment, but while the embodiment is a dual bevel configuration saw, the example saw 100 is a single bevel configuration.
  • the links 74' and 76' are connected together by a shaft 78' that is not as long as the shaft 78 of the embodiment, because the links 74' and 76' are vertically adjacent one another rather than being spaced apart.
  • the link 76' is at an elevation that is substantially similar to the elevation of the link 54' and therefore unable to fold toward the link 52" and 54'.
  • the connection between link 74' and 76' extends outwardly away from the links 52' and 54'. Because of the outward extension, particularly when it is folded as shown in FIGS. 6 and 8 , the links interfere with other portions of the saw 100 when the saw would be pivoted in the counterclockwise direction as shown in FIG. 8 . Therefore, the single bevel operation of this example is in the clockwise direction as shown in FIG. 8 .
  • Saw 110 has a horizontal hinge linkage comprising links 52" and 54" that are interconnected and operate substantially similar to those described in FIGS. 1-8 .
  • the saw pivot head 34" has a slightly different configuration and the end of the link 54" is connected to the saw pivot shaft 32 which is also journaled in the saw pivot head 34".
  • An elongated rod 112 is journaled in a bushing (not shown but located in the upper end of support frame 38) and maintains the saw pivot head 34" at a constant elevation as the blade and motor assembly 22 moves the blade 28 toward the fence 14.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Sawing (AREA)

Claims (3)

  1. Motorbetriebene Gehrungssäge (10), die Folgendes umfasst:
    - eine Sägenbasis (12) mit einem Anlegeblech (14) zum Positionieren eines Werkstücks;
    - ein Tisch (16), der mit der Sägenbasis (12) verbunden ist;
    - eine Gehrungsarmanordnung (18) zum Anordnen des Tisches (16) in einem Winkel zur Sägenbasis (12);
    - eine Sägeblatt- und Motoranordnung (20), die mit der Tisch (16) wirkverbunden ist;
    - einen linearen Führungsmechanismus (22), der dafür eingerichtet ist, die Sägeblatt- und Motoranordnung (20) zu stützen, wobei der Mechanismus (22) und die Sägeblatt- und Motoranordnung (20) relativ zu dem Tisch (16) geschwenkt werden können, um den Winkel der Ebene des Blattes zu verstellen, um verschiedene Schrägschnitte ausführen zu können, wobei der Mechanismus (22) eine Bewegung der Sägeblatt- und Motoranordnung (20) entlang eines zuvor festgelegten linearen Pfades in der Vorwärts- oder der Rückwärtsrichtung ermöglicht;
    wobei der Mechanismus (22) eine erste horizontale Welle (32) aufweist, welche die Sägeblatt- und Motoranordnung (20) geschwenkt werden kann, um ein Sägeblatt (28) vertikal in die Schneidposition und aus der Schneidposition zu bewegen;
    wobei der Mechanismus (22) ein erstes mehrgliedriges Scharnier (52, 54) aufweist, das die Sägeblatt- und Motoranordnung (20) und den Tisch (16) schwenkbar mit horizontalen Wellen (56, 62, 64) verbindet, wenn die Säge auf eine Null-Grad-Schrägenposition eingestellt wird, wobei die Wellen (56, 62, 64) parallel zueinander und senkrecht zu der Ebene des Blattes verlaufen, und ein zweites mehrgliedriges Scharnier (74, 76) aufweist, das die Sägeblatt- und Motoranordnung (20) und den Tisch (16) schwenkbar mit Wellen (78, 80, 82) verbindet, die parallel zueinander und allgemein senkrecht zu den allgemein horizontalen Wellen (56, 62, 64) verlaufen, wobei der Tisch (16) drehbar mit der Sägenbasis (12) verbunden ist;
    wobei der lineare Führungsmechanismus (22) an einem Ende an dem Tisch (16) angebracht ist und an seinem anderen Ende an einem Sägeschwenkkopf (34) angebracht ist; und wobei die Sägeblatt- und Motoranordnung (20) um eine Sägeschwenkwelle (32) herum schwenkbar ist, die mit dem Sägeschwenkkopf (34) verbunden ist;
    wobei das erste Scharnier (52, 54) erste und zweite Scharnierglieder (52, 54) umfasst, die durch eine zweite horizontale Welle (56) aneinander angelenkt sind, wobei das erste Glied (52) auch durch eine dritte horizontale Welle (64) schwenkbar mit dem Tisch (16) verbunden ist und das zweite Glied (54) durch eine vierte horizontale Welle (62) schwenkbar mit der Sägeblatt- und Motoranordnung (20) verbunden ist, wobei die zweite, die dritte und die vierte horizontale Welle (56, 64, 62) parallel zueinander verlaufen; und
    wobei das erste Glied (52) eine allgemein L-förmige seitliche Konfiguration mit einer Querverlängerung (66) aufweist, die eine Öffnung aufweist, in der sich die zweite horizontale Welle (56) befindet, wobei das erste und das zweite Glied (52, 54) in einer allgemein parallelen Anordnung zusammengeklappt werden können, wenn die Blatt- und Rotoranordnung (20) entlang des zuvor festgelegten linearen Pfades in der Vorwärtsrichtung in ihre endgültige Schneidposition bewegt wird, in der sich das Blatt neben dem Anlegeblech (14) befindet;
    wobei der Sägeschwenkkopf (34) ein Paar voneinander beabstandeter Flansche (58) und einen einzelnen Flansch (60), der sich unter dem Paar voneinander beabstandeter Flansche (58) befindet, umfasst;
    wobei das zweite Glied (54) mit dem Paar voneinander beabstandeter Flansche (58) durch die vierte horizontale Welle (62) verbunden ist;
    wobei das zweite Scharnier (74, 76) des Weiteren ein drittes Glied (76) umfasst, das mit einem Ende an dem einzelnen Flansch (60) angelenkt ist, und ein viertes Glied (74) umfasst, das mit einem Ende an dem Tisch (16) angelenkt ist, wobei das jeweils andere Ende der dritten und vierten Glieder (76, 74) durch eine längliche vertikale Welle (78) schwenkbar so miteinander verbunden sind, dass die dritten und vierten Glieder (76, 74) auf verschiedenen Höhen liegen;
    wobei sich das zweite Scharnier (74, 76) unter dem ersten Scharnier (52, 54) befindet und die Verbindung zwischen den dritten und vierten Gliedern (76, 74) in Richtung des ersten Scharniers (52, 54) und unter dem ersten Scharnier (52, 54) verläuft, wenn die Sägeblatt- und Motoranordnung (20) entlang des zuvor festgelegten linearen Pfades in der Rückwärtsrichtung bewegt wird.
  2. Gehrungssäge (10) nach Anspruch 1, wobei die ersten Scharnierglieder (52, 54) eine Breite von mindestens 7,62 cm (3 Inch) haben, um der Sägeblatt- und Motoranordnung (20) auf diese Weise eine hohe strukturelle Steifigkeit zu verleihen.
  3. Gehrungssäge (10) nach Anspruch 1 oder 2, wobei mindestens ausgewählte der Glieder (52, 54) Metallgussstücke mit Öffnungen an den beiden Enden umfassen, um die horizontalen Wellen (56, 62, 64) aufzunehmen, wobei die Gussstücke Außenseitenabschnitte (68, 70) und Verstrebungsabschnitte (72), welche die Außenseitenabschnitte (68, 70) miteinander verbinden, aufweisen.
EP20060124239 2005-11-22 2006-11-16 Gehrungssäge mit einer aus einer Gelenkverbindung bestehenden Linearführung Active EP1787773B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11/284,931 US8499672B2 (en) 2005-11-22 2005-11-22 Power miter saw with hinge linkage linear guides

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EP1787773A1 EP1787773A1 (de) 2007-05-23
EP1787773B1 true EP1787773B1 (de) 2013-06-26

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EP (1) EP1787773B1 (de)
CN (1) CN1974092B (de)
TW (2) TWI396598B (de)

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US8631734B2 (en) 2005-11-22 2014-01-21 Robert Bosch Gmbh Glide movement controller and power miter saw including such controller
US20070137452A1 (en) * 2005-11-22 2007-06-21 Oberheim Stephen C Power miter saw with hinge linkage linear guides
US8857303B2 (en) * 2005-11-22 2014-10-14 Robert Bosch Gmbh Locking mechanism for miter saw with hinge linkage linear guide
US8752461B2 (en) * 2005-11-22 2014-06-17 Robert Bosch Gmbh Hinge connections and power miter saw with hinge linkage linear guide including such hinge connections
US20120017736A1 (en) * 2005-11-22 2012-01-26 Robert Bosch Tool Corporation Power cord routing system for miter saw with hinge linkage linear guide
CN101347847B (zh) * 2007-07-21 2012-11-21 苏州宝时得电动工具有限公司 电动斜切锯
JP5179232B2 (ja) * 2008-03-21 2013-04-10 株式会社マキタ 卓上切断機
US20100058909A1 (en) * 2008-09-11 2010-03-11 Shaodong Chen Power tool
JP5249705B2 (ja) * 2008-10-10 2013-07-31 株式会社マキタ 卓上切断機
JP5530649B2 (ja) * 2009-03-26 2014-06-25 株式会社マキタ スライドマルノコ
US8573104B2 (en) * 2010-01-07 2013-11-05 Robert Bosch Gmbh Miter detent override mechanism
CN102615343B (zh) * 2011-01-30 2014-04-02 苏州宝时得电动工具有限公司 切割机
US9649703B2 (en) * 2012-03-15 2017-05-16 Rexon Industrial Corp., Ltd. Circular saw with a moving mechanism
TWI586505B (zh) * 2014-09-11 2017-06-11 力山工業股份有限公司 多連桿鋸切機
TWI569910B (zh) * 2015-11-16 2017-02-11 力山工業股份有限公司 可收折的鋸切機
WO2016131412A1 (zh) * 2015-02-16 2016-08-25 苏州宝时得电动工具有限公司 动力工具
CN107848049B (zh) * 2015-04-17 2022-01-25 罗伯特·博世有限公司 具有成角度的滑移铰链的斜切锯
US10150171B2 (en) 2016-02-16 2018-12-11 Viktor Bliznyuk Miter saw linear movement assembly
US12053902B2 (en) * 2020-02-24 2024-08-06 Tony J. Ballew Articulated mast section for chop saws
CN113967948A (zh) * 2020-07-24 2022-01-25 苏州宝时得电动工具有限公司 斜断锯

Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US176343A (en) * 1876-04-18 Improvement in mitering-machines
US1707764A (en) * 1926-08-09 1929-04-02 Mattison Machine Works Machine tool
US1765733A (en) * 1926-11-20 1930-06-24 Mattison Machine Works Power-driven saw
US1766733A (en) * 1929-01-15 1930-06-24 Crompton & Knowles Loom Works Loom picker-rod spindle support
US2007563A (en) * 1931-03-09 1935-07-09 Koning Arthur E De Mechanical movement
US2569354A (en) * 1946-11-22 1951-09-25 Mearl V Tracy Straight-line-motion swinging saw support
US2708952A (en) * 1953-07-08 1955-05-24 Homer W Blackwell Radial arm type mounting for power driven saws
DE2616608A1 (de) 1976-04-13 1977-10-27 Johansson Axel Evald W Schneidmaschine
AU4887185A (en) 1984-10-17 1986-04-24 Builder Mate Products Pty. Ltd. Power tool mounting assembly
US4587875A (en) * 1985-05-02 1986-05-13 Theodore Deley Portable sawing device utilizing a circular power saw
DE3721471A1 (de) * 1987-06-30 1989-01-12 Eisele Maschf Chr Kreissaegemaschine
US4892022A (en) * 1988-09-20 1990-01-09 Robert Bosch Power Tool Corporation Safety guard for sawing power tool particularly mitre saw
US5257570A (en) * 1990-07-16 1993-11-02 Ryobi Limited Circular saw unit
US5265510A (en) * 1992-01-13 1993-11-30 Hoyer Ellefsen Sigurd Material working and tool control system
US5437214A (en) * 1992-05-22 1995-08-01 Makita Corporation Miter saw
WO1993025357A1 (en) * 1992-06-15 1993-12-23 Alpine Engineered Products, Inc. Automatic saw machine and method
US5791224A (en) * 1994-03-24 1998-08-11 Ryobi Limited Circular sawing machine
JP3283745B2 (ja) * 1996-02-05 2002-05-20 株式会社マキタ 電動工具の操作レバー
JP3922476B2 (ja) * 1997-08-01 2007-05-30 リョービ株式会社 卓上切断機
US6877410B2 (en) * 2000-09-29 2005-04-12 Sd3, Llc Miter saw with improved safety system
US7020450B2 (en) * 2000-09-05 2006-03-28 Nec Corporation Active inductors using bipolar silicon transistors
US20040069109A1 (en) * 2002-10-11 2004-04-15 Sprague Donald G. Free swinging portable cutting work station
US6892618B2 (en) 2003-08-06 2005-05-17 Chang Chin-Chin Circular sawing machine having a link mechanism
US7059228B2 (en) * 2003-09-11 2006-06-13 Chin-Chin Chang Hand-controlled circular saw

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US8499672B2 (en) 2013-08-06
US20070151434A1 (en) 2007-07-05
TW200914225A (en) 2009-04-01
EP1787773A1 (de) 2007-05-23
TWI396598B (zh) 2013-05-21
TW200726556A (en) 2007-07-16
CN1974092B (zh) 2015-03-25
CN1974092A (zh) 2007-06-06
TWI462816B (zh) 2014-12-01
US20070113718A1 (en) 2007-05-24

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